A. Found 3 at 2B. Found 3 at 3C. Compilation failsD. An exception is thrown at runtime

Answer: CExplanation:The following line does not compile:System.out.print(“Found ” + key + “at ” + pos);The variable pos is undefined at this line, as its scope is only valid in the for loop. Any variables created inside of a loop are LOCAL TO THE LOOP.

A. Sum for 0 to 0 = 55B. Sum for 0 to 10 = 55C. Compilation fails due to error on line 6.D. Compilation fails due to error on line 7.E. An Exception is thrown at the runtime.

Answer: DExplanation:Loop variables scope limited to that enclosing loop. So in this case, the scope of the loop variable x declared at line 5, limited to that for loop. Trying to access that variable at line 7, which is out of scope of the variable x, causes a compile time error. So compilation fails due to error at line 7. Hence option D is correct. Options A and B are incorrect, since code fails to compile. Reference: httpsy/docs.oracle.com/javase/tutorial/java/nutsandbolts/variables.html